RawObject
    content  Value
    received UTCTime

LocalMessage
    author  PersonId
    rest    MessageId

    UniqueLocalMessage rest

RemoteMessage
    author     RemoteSharerId
    instance   InstanceId
    ident      Text
    rest       MessageId
    raw        RawObjectId
    lostParent Text           Maybe

    UniqueRemoteMessageIdent instance ident
    UniqueRemoteMessage rest